Thanks for playing! We're glad you found it fun.
Firing is point and click with the mouse, so it should just go where you click. Unless you were used the keyboard to fire with. In that case the game would have been multitudes harder then we intended.
Once I increased the duration and size of the power up text, I thought that the power ups could be a little bigger too. I am glad to know my thought wasn't the only one.
Thank you for the positive feedback.